blanks



' 2 Sh.eets'-Sheet 1. G; W. BLANKS 85 B. L'EFBBUREL DRY PRESS BRIGKMACHINE (No Model.)

. No.- 507,477. Pa-tehted' 001;. 24, 1893.

n h I H UNITED STATES PATENT OFFICE.

GEORGE WALTER BLANKS AND BERNARD LEFEBURE, OF SYDNEY, NEW

. SOUTH WALES.

DRY-PRESS-BRICK MACHINE.

SPECIFICATION forming part of Letters Patent No. 507,477, a ed 1 0136124, 1893.

Application filed February 25,1891. Serial No. 382,692. (No model.)Patented in New South Wales June 13, 1890, No. 2.254,

' and in VictoriaJunc 20, 1890, No. 7.829.

' To aZZ whom it may concern.-

Be it known that we, GEORGE WALTER BLANKS and BERNARD LEFEBURE, subjectsof the Queen of Great Britain, and both residing at Sydney,in the Colonyof New South Wales, have invented new and useful Improvements inDry-Press-Brick-Wlaking Machines, (for which we have received LettersPatent in New South Wales, No. 2,254, dated June 13, 1890, and inVictoria, No.7,829, dated June 20, 1890;) and we do hereby declare thatthe following is a full, clear, and exact description of the invention.

The object of our invention is to construct a dry press brick-makingmachine which shall be capable of producing bricks which do not vary insize and which when being molded, shall be pressed with an equal top andbottom pressure of many tons, making them solid, compact, and even inshape.

The dry press brick-making machines at present in use necessitate theuse of heavy framing in their construction as it is customary to use twomain shafts, and when the brick is being pressed owing to the two shaftsand the height of 'the framing, the various partsof the machine spring,and as a result the bricks vary in size, and cause the stampers to foulwith the edges of the liners, wearing them rapidly away. The steelliners and die plate too are usually so arranged as to cause great lossof time when replacing with new ones.

In our invention we use but one main shaft or cam shaft in theconstruction of our dry press brick-making machine, and the pressure onthe Stampers, of which we use two, a top stamper and abottom stamper, isequally distributed on the cam shaft the cams on the shaft forcing onestamper up and pulling the other stamper downward; there is thereforelittle tendency to spring or bend the cam shaft,

and the pressure being on the cam shaft only the framing is not in anyway distorted.

Our liners are simply dropped into recesses made to receive them in thetable to which the die plate is screwed, and are easily renewed in ashort space of time.

For operating the charger box, we use earns secured to one of the gearedwheels.

Figure l is a section at Z Z. Fig. 2 'is a plan. Fig. 3 is alongitudinal section atXX.

Fig. 4 is an elevation showing the method of which are bolted theupright frames B, B. On,

the frames B, B, and bolted to them rests the table O of cast or wroughtiron. To the table G are bolted the guides D and E. On the driv- 1ngshaft F are the fast and loose pulleys G and H. On the shaft F is keyedthe spur wheel I which gears with the toothed wheel J which is keyed onthe shaft K. At the opposite end of the shaft K is keyed the spur wheelL which gears with the toothed wheel M which is keyed on the cam shaftN. The cams Ct and b are rigidly attached to the cam shaft N to actuatethe top stamper O, and c and d are cams rigidly attached to the camshaft N to actuate the bottom stamper P. The cams e andfon the cam shaftN, are for raising the top stamper 0 rapidly, and for keeping it raisedwhile the charger box travels forward and deposits its charge ofmaterial in the die boxes. While the charger box (1' is stationary, thetop stamper 0 drops through the charger on to the ma terial filling themold and thus insures a full charge. The top stamper O is now raised bythe cams e and fand the charger is drawn backward.

The top stamper O is connected by means of the rods 9 and h to theframes Q and R respectively, which are preferably of cast iron, anddivided into two parts at j and in respectively, and are held togetherby the rods l and keyed by the cotters m.

The frames Q and R travel vertically in the guides n and 0. y

In the bottom of the frames Q and R are the rollers r and srespectively, which act in contact with the cams on and b. In the bottomstamper P are the rollers t and a which act in contact with the cams cand d. On the bolts 41 and w are the rollers 00 and g which act incontact with the cams e and f.

The bottom stamper P slides in the guides z, a, which may be cast on thetable 0. The

liners a which may be of steel, cast-iron or any other suitable metalfit in recesses in the table C and the die plate 1) fits over them, andis securely fastened to the table guide bars 0 are bolted to the table Cto act as guides for the charger box (1, which is operated by the leverse andf. The lever e is attached to the spindle g on which is alsoattached the lever f at the end of which is the roller [0 j which actsin contact with the cam pieces 7c and l, the latter being securelybolted to the toothed wheel M.

\Ve will further proceed to describe our invention. Motion iscommunicated to the cam shaft N from the pulley H and gearing I, J, L,M. The charger box receives its charge of material from the hopper m,and is pulled over the die boxes or and 0' by means of the levers eandf' which are actuated from the cam pieces kand Z on the toothed wheel M,and empties itself into the die boxes n and 0' and rapidly returns toits original position. In the meantime the bottom stamper P as the camsc and d revolve has fallen to its lowest position. The top stamper 0,held in its highest position by the cams e and f, falls on the materialand is quickly raised again to its highest position by the same cams andheld there until the charger box d has returned. The cams eand frevolving with the cam shaft N now allow the top stamper O to fall; asthe shaft N revolves, the cams a, and b acting on the rollers r and sbegin to pull downward the top stamper O and press the brick. At thesame time the bottom stamperP is forced upward by the cams c and d andpresses the brick from the bottom. The top and bottom stampers O and Pare thus drawn toward each other until the limit of pressure is reached.The cams a and I) now release the top Stamper O which is raised by thecams e and fand held raised until the charger box cl returns; and thecams c and cl force the now molded brick to the surface of the die plateI), the brick being pushed forward by the charger box cl in its nextstroke. It is seen that the stain pers O and P traveling toward eachother with a constantly increasingpressure and with an equal pressure onthe top and bottom of the brick produce a brick which is even in form,compact, solid and smooth.

If the liners require renewing, by unscrewing the die plate I) andlifting it from the table 0, the liners may be renewed in a shortperiod.

Provision is made for heating the top and bottom stampers as ordinarily.

For regulating the density of the brick, a device is attached below thetable C, consisting of a saddle 12 and a guide q through which passesthe bar r inclined at s and t and having a thread it at one end, onwhich is screwed the wheel '0', locked by the locknut w. It is seenlhatby screwing or unscrewing the wheel to, the bar 7" is raised or lowered,the bottom stamper P falling on the bar 9" at each stroke, thusregulating the density of the brick to suit various materials.

Having now particularly described and ascertained the nature of our saidinvention and in what manner the same is to be performed, we declarethat what we claim is-- In a brick machine, the combination with theframe of a saddle arranged on one side thereof, a guide located 011 theopposite side of the machine, a bar passing through the guide and havinga threaded end passing through the saddle, the said bar being inclinedat the points of passage through the guide and the saddle, a threadedhand wheel on the said threaded end, and a nut for looking the saidwheel on the bar; substantially as described.

In witness whereof we have hereunto set our hands in presence of twowitnesses.

GEORGE WALTER BLANKS. BERNARD LEFEBURE.

Witnesses:

WILLIAM WALKER, ALFRED SHAW, Notary Public, Sydney, N. S. Wales.

